Posted Date
Effective Date
Test Name Warfarin, Serum
Update Type Replacement Test
CPT Code 80299
Order Code WRF

TEST CHANGE

 

TEST OBSOLETE

 

Warfarin, Serum

Order Code:                             WRF

CPT Code:                               80299

Referral Laboratory:                Mayo Laboratories

 

REPLACEMENT TEST

 

Warfarin, Plasma

Order Code:                             FWARP

CPT Code:                               80375

Referral Laboratory:                Mayo Laboratories

 

Effective August 15, 2020, MLabs will be replacing the Warfarin, Serum (FSCMS) test and replacing if with Warfarin, Plasma (FWARP) test per Mayo Medical Laboratories.

 

Collection Instructions: Collect 3mL of whole blood in an EDTA lavender top vacutainer or pink top vacutainer. Centrifuge and aliquot the plasma into a plastic vial. Ship the specimen refrigerated to MLabs. 

 

Specimen Stability

Specimen Type

Temperature

Time

Plasma

Refrigerated (preferred)

14 Days

 

Ambient

14 Days

 

Frozen

90 Days

 

Methodology: High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)

 

Test Analysis: Mon- Sun 8 days

 

Reference Range:  0.2 mcg/mL

                               The reported value may vary based on dilution or weight of the specimen